I remember this map from a while ago, that spot was IMPOSSIBLE to reach. The zombies can get you from the sides but if you sit correctly, you can stay protected throughout the round and not get zombified. I believe this should be illegal.

Its been a while since I played this map so I had forgotten about this location. Since it is clearly illegal it has been officially listed: http://www.plaguefest.com/harvey/illegalspots/zm_westwood_final.html